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Liabilities and Restructuring Charges - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Jul. 31, 2021
Oct. 31, 2020
Payables and Accruals [Abstract]    
Payroll and related benefits $ 486,322 $ 492,626
Other accrued liabilities 88,110 101,035
Accounts payable 41,305 30,003
Total $ 615,737 $ 623,664